Boll guard for edging machines



G. W, D-ORMAN. BOLL GUARD FOR EDGING MACHINES. APPLlcATloN Flr-ED. Aue. 216. 192.0J

Patented May 941922.

2 SHEETS-SHEET l.-

G. W. DORMAN. ROLL GUARD FOR EDGING MACHINES.

APPLICATION man Aue.26. |920.

1,41 5,81 o, Patented May 9, 192:1

2 SHEETS-SHEET 2- @www ATTORNEY UNITED STATES PATENT OFFICE.

GEORGE W. DORMAN, `OF EVERETT, WASHINGTON, ASSIGNOR '.IO SUM'NER IRON WORKS, 0F EVERETI WASHINGTON, A CORPORATION OF WASHINGTON.

ROLL GUARD FOR EDGING- MACHINES.

Application led August 26, 1920.

T0 all whom 'it may concern.'

Be it known that I, Gnonen W. Don-MAN, a citizen of the United States, residing at Everett, in the county of Snohomish and State ofVVashington, have invented a new and useful Roll Guard .for Edging Machines, of which the following is a specification.

The present invention relates to improvements in guards for edging machines.

In working with edging machines, the operator is compelled to assume a position in close proximity to the feed rolls. He is therefore in danger, when working, of having his hands or portions of his clothing being drawn in by the feed rolls with the result of serious bodily injury.

Ob'ects of the invention are to provide a guar ing` apron or shield which is held spaced from the periphery of the upper feed roll of the edger and is adapted to move therewith when the feed roll is adjusted to different thicknesses of lumber, and whose position with respect to the roll may be ad- '.iusted.

Other objects are to provide a guard particularly adapted to be used in connection with press rolls which are carried by hinged or pivoted arms and which guard, if displaced either inwardly or outwardly with respect to the roll, will return to its original position when released. y The invention will `be best` understood from a consideration .of the following detailed description taken in connection with the accompanying drawings forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with. the showing in the drawings, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

Fig.` l is a perspective view of an edger withthe front feed roll provided with the guard of the present invention.

i y Fig. 2 is a diagrammatic end elevation of the machine showing the construction of the guard in detail.

Fig. 3 is a fragmentary top plan view showing the mounting of the guard and its connection with the adjacent portion of the machine.

Specification of Letters Patent.

Patented May 9, 1922.

Serial No. 406,162.

Fig. 4 isa perspective view of the pivot bar of the guard showing the apron in dotted lines.

The drawings, particularly in Fig. l, illustrate a modern edging machine whose con-- struction, forming, as it does, no part of the present invention, not here described. The only parts of the machine to which it is necessary to refer are the upper feeding-in roll 5, which, as will be readily understood, is adjusted upwardly and downwardly for different thicknesses of lumber, and the roll arms 6. The arms 6 have bearings to receive the roll shaft and are pivotally supported at their opposite ends upon the machine.

Bracket elements 7 each comprises the upn per half f a bearing box 7 and an armA 7l secured thereto (see Fig. 3), to provide means for supporting the guard of the present invention. The complete bearing for the roll shaft is provided by the outer ends of the arms 6 in cooperation with the upper part of the bearing box 7, these two parts being bolted together as shown to form a complete bearing box.

The guard proper comprises a steel apron i() secured along one face of a rectangular bar 9 in, any appropriate manner. The bar 9 at each end is provided with gudgeons 8, which `gudgeons are received in the outer ends of arms 7b, so that the gudgeons provide a pivotal support. One of the gudgeons mounts a collar ll. which has a set screw or the like sothat its angular position on the gudgeon may be adjusted and then maire tained. The collar l1 has an 12 preferably integral therewith, which, because of .its function will hereafter be called the centering arm. A clip l5 is secured upon the arm 6 nearer the inner or pivoted end thereof, which clip, as seen in 2, comprises a strap bent at an angle and has a bore near its outer or free end for receiving an eye bolt or similar means llt. Said eye bolt is in turn connected with one end of a coil spring 13, the other end of said spring being connected to the free end of the centering arm 12. The action of the spring 13 is to tend to maintain the centering arm l2 in alinement with the eye bolt 14, and in the normal position of the parts, the spring, the centering arm and the eye bolt are all alined, as is shown in Fig. 2. Any movement of the apron 10 inwardly toward the roll will move the centering arm 12 in a clockwise direction, which movement will be resisted by the spring 13. If the apron 10 is moved outwardly, the arm 12 will be swung in a counter-clockwise direction, which movement is again resisted by the spring.

The eye bolt 14 provides convenient means by which the tension of the spring 13 may be adjusted. The set screw on the collar l1 provides means by which the apron 10 may be maintained in a given position relative to the periphery of the roll 5. Vhatever the position of the collar 11 upon the supporting gudgeon, the arm 12 will be maintained by the spring 13 substantially in the position shown in Fig. 2; hence it is possible to adjust the position of the apron nea-r to or removed from the periphery of the roll and to have said position maintained by the resilient action of the spring.

Since the bracket is fixed upon the roll arm and since the eye bolt and strap are also fixed relatively to theroll arm, when the roll 5 is swung in any desired position, the

arm l2 is still maintained in alinement with the spring 13 and the tension-adjusting eye bolt, with the result that the guard apron 10 is maintained in the same spaced relation to the roll. In Fig. 2, a large timber 16 is indicated in dotted lines passing through the machine, which timber has raised the feeding roll 5v also as indicated in dotted lines. In this upper or raised position of the feeding roll, it will be seen that the apron 10 is still maintained spaced. from the periphery of the roll. If a relatively thin board is passing through the machine, the positions of the parts are shown in full lines in the same figure, where the lower edge of the apron lO is shown as spaced a short distance above the board which engages With the lowermost part of the roll.

Among the advantages of the present invention are that it is entirely self-sustained and supported on an edger and not on some independent element; that it can be used equally `as well on both press rolls of a vdivided or broken roll edger as on a solid roll edger, with the roll extending the full length of the saw space; and that as the guard apron is hinged and flexibly mounted, the lumber passing under the same cannot stick or become fouled with the guard if it is of une-ven thickness or hasany projections on the top surface.

That is claimed is .1. A feed roll vguard for edging machines having upper swingable rolls, comprising an apron hingedly supported upon the upper roll armsin front of the roll.

2. A feed roll guard for edging machines having upper swingable rollsv comprising an apron hingedlyI supported upon the upper roll arms in front of the roll, and means for maintaining said apron spaced from the periphery of said roll whatever the angular position of the roll relative to the machine.

3. A feed roll guard for edging machines having upper swingable rolls comprising an apron hingedly supported upon the upper roll arms in front of the roll, and yieldable means for maintaining said apron spaced from the periphery of said roll whatever the angular position of the roll relative to the machine, whereby if the apron is displaced. either inwardly or outwardly it will return to a predetermined position.

l, A feed roll guard for edging machines haring upper swingable rollsI comprising an apron hingedly supported upon the upper roll arms in front of the roll, and adjustable and yieldable means for maintaining said apron spaced from the periphery of the roll the desired extentregardlcss of the angular position of the roll.

5. A feed roll guard for edging machines having upper swingable rolls comprising an apron hingedly supported upon the upper roll arms in front of the roll. means for maintaining said apron spaced from the periphery of said roll whatever the angular position of the roll relative to the machine comprising a centering arm secured to the apron, a spring connected at one end to said centering arm, a screw-threaded adjusting element connected to the other end of the spring, and a clip receiving said adjusting element and `fastened to the neighboring roll arm.

6. A feed roll guard for edging machines, comprising an apron hingedly supported relatively to the feeding-in roll, said apron extending the full length of the roll and comprising a fiat sheet and a bar detachably mounted together, the bar being rectangular in cross section and the sheet being attached to the outer side face of the bar, and gudgeons at the bar ends extending beyond the s'heet and providing means whereby the apron may be pivoted.

7. A feed roll guard for edging machines having swingable rolls comprising an apron, brackets pivotally supporting the apron and mounted on the roll arms where supporting the rolls and in surrounding relation to the roll shaft, a centering arm secured to the apron., and means connecting the centering arm and the adjacent roll arm to maintain thc apron spaced from the roll whatever the elevation of the roll.

8. A feed roll guard for edging machines having swingable rolls comprising an apron` brackets pivotally supporting the apron and mounted on the roll arms where supporting the rolls and in surrounding relation to the roll shaft, a centering arm secured t0 the apron, said centering arm being angularly adjustable relative to the apron, and means connecting the centering arm and the adjacent roll arm to maintain the apron spaced from the roll Whatever the elevation of the roll.

9. A feed roll guard for edging machines having swingable rolls comprising an apron, brackets pivotally supporting the apron and mounted on the roll arms Where supporting the rolls and in surrounding relation to the roll shaft, a centerin arm secured to the 10 apron beyond one of its pivots, said centering arm being angularly adjustable relative to the apron, and spring means connecting the centering arm and the adjacent roll arm to maintain the apron spaced from the roll Whatever the elevation of the roll and to permit displacement of the apron.

In testimony that I claim the foregoing as my own, I have hereto aixed my signature.

GEORGE W. DORMAN. 

